Yamaha R15M Year: 2021 Engine Type Liquid-cooled, 4-stroke, SOHC, 4-valve Displacement 155cc Bore x Stroke 58.0 mm × 58.7 mm Compression Ratio 11.6 : 1 Starter System Electric starter
R15M WGP 60th Anniversary Edition Year: 2021 Engine Type Liquid-cooled, 4-stroke, SOHC, 4-valve Displacement 155 CC Bore x Stroke 58.0 mm × 58.7 mm Compression Ratio 11.6 : 1 Starter System Electric starter